As mentioned above, there is a rather startling duality between non-relativistic systems (where speed of light \(c\rightarrow \infty \) ) and ultra-relativistic or Carrollian systems (\(c\rightarrow 0\) ) in spacetime dimensions \(d=2\)  [1]}. In general dimensions, both systems have degenerate metrics and hence non-Riemannian background structures. These structures are fibre bundles. In the case of non-relativistic systems, the base of the fibre bundle is the time direction \({\rm I\!R}_t\)  and the fibres are \((d-1)\)  dimensional spatial slices \({\rm I\!R}^{d-1}\)  [2]}, [3]}. The Carrollian limit interchanges the base and the fibre [4]}. In the case of \(d=2\) , the base and fibre are both one dimensional and interchanging them does not change the background symmetry algebra. So Carrollian and Galilean algebras in \(d=2\)  are isomorphic and the isomorphism extends to their conformal counterparts, the Carrollian conformal and the Galilean conformal algebras. Hence, results constructed for 2d Carrollian CFTs are valid (upto an exchange of spatial and temporal directions for coordinate dependent answers) for 2d Galilean CFTs and vice-versa.
